Swivel coupling



Sept. 21, 1948.

SWIVEL COUPLING I Filed May 14, 1946 iTJQi J I a I 4 I I Q Pzerr-eMmrwaw/I;

P. M. HARDWICK 2,449,744 4 Patented Sept. 21, 1948 TENT OFFICE 2,449,744SWIVEL comma Pierre M. ardwick, Los Angeles, Calif. Application May 14,1946,Serlal No. 669,487

The present invention relates to swivel couplings and among its objectsare to oppose or prevent the accidental detachment of the couplingelements while permitting'of their relative rotary motion intoadjustment in any required position; to provide for opposing orpreventing relative detachment of the coupling elements in such a waythat they are relatively annularly'adjustable so that they cannot beseparated or blown apart; to provide swivel couplings which functionnormally and yet may not be uncoupled; to provide a swivel couplingembodying the features indicated, and which is comparatively economicalin construction, assembly and operation; and generally to provide animproved swivel coupling as will be the mate flange on the other part.

The invention also comprises the improvements to be presently describedand finally claimed. In the following description reference will be madeto the accompanying drawing, formingpart hereof and in which, 4

Figure 1 is a central sectional view.

Fig. 2 is a transverse sectional view taken on the line 2-2 of Fig. l.

Fig. 3 is a transverse sectionalview taken on the line 3-3 of Fig. 1.

Fig. 4 is a side view of the coupling shown in Fig. 1; and

Fig. 5 is a view looking from left to right in Fig. 1 and taken on theline 5-5.-

Referring to the drawing, I and 3 indicate the parts of the coupling.The tubular part I is constructed of brass or of any other metal whichcan be expanded or stretched readily. The part I is shown as providedwith an externally arranged flange 2. The part 3 is provided withinternally arranged flanges I l and I2. I is the inside flange which isturned in. The parts of the coupling are assembled by introducing the Ipart I into the part 3 in proper relative position with the packing llinterposed between them, by expanding the part I so that it interengagesand connects the parts together. The part 1 may be expanded through theintervention of any appropriate expanding device, and thus the parts Iand 3 may be and are permanently connected. As

is full. solid flange.

60 within the other.

2 Glaims. (Cl. 2 8597 .9)

three-sided cavity l0, in which the packing is mounted, so that thepacking is confined by the part 3 on three sides. and by the part i atthe other side. The space 6 provides clearance for 5 flange 8. At oneend of the coupling element there may be provided a washer or gasket 1and theexterior of the coupling'shown at the right in Fig. 4 is shown asroughened as at 9 or provided with flat faces so that it can beconveniently 10 held by the hand or by means of a tool.

Referring to Fig. 5, the outwardly directed flange is shown as radiallycut or slotted at intervals along its perimeter, so that the flange isin the form of segments oi a flange instead of a This segmental flangeconstruction may not be necessary in all cases, but may in some cases bedesirable.

It will be obvious to those skilled in the art to which the inventionrelates that modifications may be made in details of construction andarrangement without departing from the spirit of the invention which isnot limited as to such matters or as to matters of mere form.

I claim:

1. In a swivel coupling, in combination, a tubular coupling elementthreaded at one end thereof "and provided at its opposite end with apair of longitudinally spaced inwardly projecting radial flanges formingan inwardly presenting gasketreceiving channel within said element. asecond tubular coupling element telescoped within said first couplingelement, said coupling members.

being adapted for relative rotation about the longitudinal axis of thecoupling, means for secur- 85 ing said couplings against relative axialdisplacement including a pair of annular flanges and a longitudinallyextending sleeve portion therebetween formed integrally on said secondcoupling element to provide an outwardly presenting chan- (0 nel withinwhich said gasket-receiving channel is nested, and an expansible gasketdisposed within the space formed between said nested channels.

2. In a swivel coupling of the character defined in claim 1 wherein saidsecond coupling member I is threaded at one end thereof and is providedat its opposite end with said outwardly presenting channel, and whereinthe flange forming the end wall of said last-mentioned channel isexpanded into position to eflect nesting of said channels one PIERRE M.HARDWICK.

file of this patent: 1

UNITED STATES PATENTS Name Date Stevens Sept. 21. 1897 Number usual, thet is provided with a ring-shaped 1,460,154 Frazier .a June 26, 1923

